well until I sold Mor Avraham last season he was in my team since the beginning. last season I was level 7, he started as a young 18 yr old MC with 19 Q, was sold when he was 24 yr old with Q of 41 I think.
I have a few players on my current squad like Cizek and Petru who are my starting strikers for the 3rd or 4th (don't really remember) consecutive season.